The document discusses various topics in chemistry, including the strength of hydrogen bonds, Le Chatelier's principle in equilibrium reactions, and dielectric constants of molecules. It also covers solvation free energy ordering and the Debye-Hückel law related to ion concentration. Several questions imply understanding complex concepts related to chemical equilibria and properties of solutions.

1. Department
of
Chemistry
G
(kJ/mol)
fF
dG
=
0
G
is
lowest
when
A S is biggest
B TdS = dH
C ΔGo
= 0
D don't know
1

2. Department
of
Chemistry
R
B
R
A
The
N-­‐HO
hydrogen
bond
strength
(ΔHo)
is
the
same
for
both
complexes
If
I
mix
one
molR,onemolA,andonemolB Iget….
A
more
R-­‐A
than
R-­‐B
C
equal
amount
of
R-­‐A
and
R-­‐B
B
more
R-­‐B
than
R-­‐A
D
don’t
know
2

3. Department
of
Chemistry
A ! B+ C
AMer
equilibrium
in
aqueous
soluNon
I
let
half
the
water
evaporate
What
will
happen
according
to
Le
Chatelier’s
principle?
A. Equilibrium shifts towards products: A ! B+ C
B. Equilibrium shifts towards reactant: A " B+ C
C. There is no change in equilibrium
3

4. Department
of
Chemistry
Which
molecule
would
you
expect
to
have
the
highest
dielectric
constant
(ε)?
A
B
C
D
Don’t
know
4

5. Department
of
Chemistry
S
Cl
O
N
C
H
What
is
the
correct
ordering
of
the
|solvaNon
free
energy|
in
water?
ΔGSolvtion
I
II
III
IV
A.
I
>
II
>
III
>
IV
B.
II
>
IV
>
III
>
I
C.
III
>
II
>
IV
>
I
D.
IV
>
III
>
I
>
II
E.
don’t
know
5

6. Department
of
Chemistry
! ± = 10" q+ q" A I
I = 1
2 q+
2
[+]+ q!
2
[!]( )
Based
on
this
equaNon
what
is
probably
not
true
A.
γ±
approaches
1
as
the
ion
concentraNon
decreases
B.
other
things
being
equal,
Zn2+
has
a
smaller
γ±
than
Br-­‐
C.
γ±
is
0
for
neutral
molecules
D.
0.01
M
CaCl2
has
a
larger
γ±
than
0.01
M
CaSO4
E.
Don’t
know
6
The
limi4ng
Debye-­‐Hückel
law

7. Department
of
Chemistry
K = e−ΔGo
/RT
R  P K = 100
What
is
ΔGo
at
25
oC?
A
-­‐11.4
kJ/mol
B
-­‐5.9
kJ/mol
C
12.8
kJ/mol
D
don’t
know
7